Determination of calcium, iron, and selenium in human serum by isotope dilution analysis using nitrogen microwave inductively coupled atmospheric pressure plasma mass spectrometry (MICAP-MS)

© 2024. The Author(s)..

In this study, we demonstrate the applicability of nitrogen microwave inductively coupled atmospheric pressure mass spectrometry (MICAP-MS) for Ca, Fe, and Se quantification in human serum using isotope dilution (ID) analysis. The matrix tolerance of MICAP-MS in Na matrix was investigated, revealing that high Na levels can suppress the signal intensity. This suppression is likely due to the plasma loading and the space charge effect. Moreover, 40Ca and 44Ca isotopic fractionation was noted at elevated Na concentration. Nine certified serum samples were analyzed using both external calibration and ID analysis. Overestimation of Cr, Zn, As, and Se was found in the results of external calibration, which might result from C-induced polyatomic interference and signal enhancement, respectively. Further investigations performed with methanol showed a similar enhancement effect for Zn, As, and Se, potentially supporting this assumption. The mass concentrations determined with ID analysis show metrological compatibility with the reference values, indicating that MICAP-MS combined with ID analysis can be a promising method for precise Ca, Fe, and Se determination. Moreover, this combination reduces the influence of matrix effects, broadening the applicability of MICAP-MS for samples with complex matrixes.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - year:2024

Enthalten in:

Analytical and bioanalytical chemistry - (2024) vom: 08. Apr.

Sprache:

Englisch

Beteiligte Personen:

You, Zengchao [VerfasserIn]
Winckelmann, Alexander [VerfasserIn]
Vogl, Jochen [VerfasserIn]
Recknagel, Sebastian [VerfasserIn]
Abad, Carlos [VerfasserIn]

Links:

Volltext

Themen:

Calcium
Human serum
Iron
Isotope dilution
Journal Article
Nitrogen microwave inductively coupled atmospheric pressure mass spectrometry
Selenium

Anmerkungen:

Date Revised 08.04.2024

published: Print-Electronic

Citation Status Publisher

doi:

10.1007/s00216-024-05274-0

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM370789652